|Name|Club|Date of departure|Replacement|Date of appointment|
|---|---|---|---|---|
|Jadet Meelarp|Chonburi|January 2009|Kiatisuk Senamuang|January 2009|
|Kiatisuk Senamuang|Chula United|January 2009|Carlos Ferreira|January 2009|
|Prajuk Viengsong|TTM Samut Sakhon|January 2009|Attaphol Puspakom|January 2009|
|Attaphol Puspakom|TTM Samut Sakhon|April 2009|Kij Meesrisuk|April 2009|
|Surasak Tansurat|Muangthong United|April 2009|Attaphol Puspakom|April 2009|
|Prapol Pongpanich|PEA|May 2009|Thongsuk Sampahungsith|May 2009|
|Hans R. Emser|Bangkok Glass|June 2009|Surachai Jaturapattarapong|June 2009|
|Pansak Ketwattha|Pattaya United|June 2009|Wisoon Wichaya|June 2009|
|Christophe Larrouilh|BEC Tero Sasana|June 2009|Tawan Sripan|June 2009|
|Wisoon Wichaya|Pattaya United|June 2009|Jadet Meelarp|June 2009|
|Carlos Ferreira|Chula United|August 2009|Pichai Pituwong|August 2009|
|Kij Meesrisuk|TTM Samut Sakhon|August 2009|Prajuk Viengsong|August 2009|
|Chatchai Paholpat|Nakhon Pathom|September 2009|Piyapong Pue-on|September 2009|

Question: how many managerial changes were there in 2009?
Answer: 13